Generation of 1.3/1.4 µm random fiber laser by bismuth-doped phosphosilicate fiber

Abstract

We have successfully generated a 1.3/1.4 μm random fiber laser (RFL) using bismuth (Bi)-doped phosphosilicate fiber. The Bi-doped RFL has shown excellent long-term operational stability with a standard deviation of approximately 0.34% over 1 h at a maximum output power of 549.30 mW, with a slope efficiency of approximately 29.21%. The Bi-doped phosphosilicate fiber offers an emission spectrum ranging from 1.28 to 1.57 μm, indicating that it can be tuned within this band. Here, we demonstrated a wavelength-tuning fiber laser with a wavelength of 1.3/1.4 μm, achieved through the using of a fiber Bragg grating or a tunable filter. Compared to traditional laser sources, the RFL reduces the speckle contrast of images by 11.16%. Due to its high stability, compact size, and high efficiency, this RFL is highly promising for use in biomedical imaging, communication, and sensor applications.

Spectral Manipulations of Random Fiber Lasers: Principles, Characteristics, and Applications

“…[ 50 ] Most recently, by using a bismuth‐doped phosphosilicate fiber, the random fiber lasing wavelength was tuned at 1.35 and 1.47 µm band by tensioning the FBG or adjusting tunable filter, which indicates the wavelength tuning potential in 1.28–1.57 µm band. [ 156 ]…”